How to Fix :Possible DHCP DOS attack seen on the esx host


In NSX-v 6.4.0, you see these symptoms:

  • You see the error: “NSX Alert :Possible DHCP DOS attack on host. (ScreenShot Attached)
    NSX Alert DHCP DOS Attack


This issue occurs because a new DHCP DoS related security feature was introduced in NSX-v 6.4.0, that may report false positives.

This is a known issue affecting VMware NSX for vSphere 6.4.x. Currently, there is no resolution.


To work around this issue, disable these warning messages. You can disable these warning messages NSX Manager Central Command Line Interface.

  1. Login to The NSX Manager SSh Console via Admin . Check the Status for the Event Notification
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How to Exclude Virtual Machines from NSX Manager Firewall Protection



NSX Manager, NSX Controllers, and NSX Edge virtual machines are automatically excluded from NSX distributed firewall protection. In addition, VMware recommends that you place the following service virtual machines in the Exclusion List to allow traffic to flow freely.

  • vCenter Server. It can be moved into a cluster that is protected by Firewall, but it must already exist in the exclusion list to avoid connectivity issues.

  • Partner service virtual machines.

  • Virtual machines that require promiscuous mode. If these virtual machines are protected by NSX distributed firewall, their performance may be adversely affected.

  • The SQL server that your Windows-based vCenter

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VSAN Observer : Configuration and Management Step By Step – Part1

This is my First Post in VSAN performance monitoring Series . In this series we will learn how to setup and configure VSAN Observer for your VSAN Cluster.

What is VSAN Observer

VSAN Observer is designed to capture performance statistics for a Virtual SAN Cluster and provide access through a web browser and capture the statistics for customer use or for VMware Technical Support.

For any vSphere, Virtual SAN, and storage administrator wanting to dig deeper and analyze performance issues, the virtual SAN observer is a valuable tool. It provides an in-depth snapshot of IOPS, latencies at different layers of … Read The Rest ......

vRealize Log Insight 3: Deployment and Configuration : Step By Step

This is my another blog post of vRealize Suite series, In this series I am going to show you how to deploy vRealize Log Insight in an easy-to-follow step-by-step guide. Lets Start..



First of all You will need to download vRealize software, from Vmware Software Manager or from your account. If you have a Partner Central account you should also have access to time-limited evaluation license keys for most VMware products.2016-07-20_19-28-20

Step 1.  Login to your vSphere Web Client and Select your vCenter Server and Right click on your Cluster and select option “Deploy OVF Template”


Step Read The Rest ......

vRealize Operations Manager (vROps) 6.2 Configuration – Step-by-Step : Part-2

Hello All ,

This is my Second blog in the Series of vRealize Operations Manager a.k.a vRops . We will learn how to configure the vROps Appliance and integrate with your infrastructure.

For Reading the deployment of the vROps . vRealize Operations Manager (vROps) 6.2 Deployment– Step-by-Step : Part-1


Before Going Through need to keep in mind that like vCops, vRops is also having the UI and ADMIN console. For both URL’s they have different use cases. UI Console gives you access to manage your environment (Add/Remove etc.) Monitor the health risk and lets you explore all the other features … Read The Rest ......

Part 4– Final Big Data Cluster Deployment Step-By-Step

Hello  All,

This is the last and Final step for Deployment of the Big Data Cluster where we will deploy all the hadoop nodes (Compute Datamaster, Compute Master, Worker Node Group, Client node Group).
You can read about the Node and there Working Description in this Post . Big Data Extension :Node Nomenclature, Description & Architecture


Lets start the Deployment.

1. Login to the vCenter WebClient and go to Big Data Extension Server plugin.


2.Click on the (+) Sign in Big Data Clusters Window and it will pop up wizard to create the Big Data cluster. Input the Name and … Read The Rest ......

Part3 : Preparation for Big Data Cluster Deployment

Hello All,

Welcome to the 3rd part for Deployment of Big Data Cluster in your Environment So you can easily deploy the Big Data cluster with no issue.


There are few preparation/changes we need to made before deployment of the Big Data Cluster Servers.

1. Prepare RPM repository for Serengeti Server.
2. Configure Resources for Big Data Clusters

1. Prepare RPM repository for Serengeti Server.

Before Deploying the Big data Cluster you need 2 packages (Necessary) to complete .


1. Login with the Serengeti user in to your Management server (a.ka. Serengeti Server).

2. Change the path to … Read The Rest ......

Part 1-Deploy VMware Big Data Extension-Step By step

Hello All,

Today I am sharing the Deployment of Vmware Big Data Extension.  Before Deployment I would need your couple of minute to know about Big Data Extension (BDE).

Read my First post of VMware Big Data Extension Here.

hadoop vmware

System Requirements for Big Data Extensions

vSphere Requirement

  • Install vSphere 5.0 (or later) Enterprise or Enterprise Plus.
  • When installing Big Data Extensions on vSphere 5.1 or later, use VMware® vCenter™ Single Sign-On to provide user authentication
  • Configure all ESXi hosts to use the same Network Time Protocol (NTP) server.
  • On each ESXi host, add the NTP server to the host
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